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virtio: revert config interrupt changes

Browse Source 
Lots of fallout from config interrupt changes. Author wants to rework
 the patches. Let's revert quickly so others don't suffer meanwhile.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio: revert config interrupt changes

Lots of fallout from config interrupt changes. Author wants to rework
the patches. Let's revert quickly so others don't suffer meanwhile.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Mon 10 Jan 2022 21:03:44 GMT
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  Revert "virtio: introduce macro IRTIO_CONFIG_IRQ_IDX"
  Revert "virtio-pci: decouple notifier from interrupt process"
  Revert "virtio-pci: decouple the single vector from the interrupt process"
  Revert "vhost: introduce new VhostOps vhost_set_config_call"
  Revert "vhost-vdpa: add support for config interrupt"
  Revert "virtio: add support for configure interrupt"
  Revert "vhost: add support for configure interrupt"
  Revert "virtio-net: add support for configure interrupt"
  Revert "virtio-mmio: add support for configure interrupt"
  Revert "virtio-pci: add support for configure interrupt"

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2022-01-11 10:12:29 +00:00
commit bf99e0ec9a
18 changed files with 100 additions and 415 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
hw/display/vhost-user-gpu.c
View File

@ -485,9 +485,6 @@ vhost_user_gpu_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VhostUserGPU *g = VHOST_USER_GPU(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return vhost_virtqueue_pending(&g->vhost->dev, idx);
}
@ -496,9 +493,6 @@ vhost_user_gpu_guest_notifier_mask(VirtIODevice *vdev, int idx, bool mask)
{
VhostUserGPU *g = VHOST_USER_GPU(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
vhost_virtqueue_mask(&g->vhost->dev, vdev, idx, mask);
}

9
hw/net/vhost_net-stub.c
View File

@ -101,12 +101,3 @@ int vhost_net_set_mtu(struct vhost_net *net, uint16_t mtu)
{
return 0;
}
bool vhost_net_config_pending(VHostNetState *net)
{
return false;
}
void vhost_net_config_mask(VHostNetState *net, VirtIODevice *dev, bool mask)
{
}

9
hw/net/vhost_net.c
View File

@ -457,15 +457,6 @@ void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
vhost_virtqueue_mask(&net->dev, dev, idx, mask);
}
bool vhost_net_config_pending(VHostNetState *net)
{
return vhost_config_pending(&net->dev);
}
void vhost_net_config_mask(VHostNetState *net, VirtIODevice *dev, bool mask)
{
vhost_config_mask(&net->dev, dev, mask);
}
VHostNetState *get_vhost_net(NetClientState *nc)
{
VHostNetState *vhost_net = 0;

10
hw/net/virtio-net.c
View File

@ -3168,9 +3168,6 @@ static bool virtio_net_guest_notifier_pending(VirtIODevice *vdev, int idx)
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
assert(n->vhost_started);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return vhost_net_config_pending(get_vhost_net(nc->peer));
}
return vhost_net_virtqueue_pending(get_vhost_net(nc->peer), idx);
}
@ -3180,11 +3177,8 @@ static void virtio_net_guest_notifier_mask(VirtIODevice *vdev, int idx,
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(idx));
assert(n->vhost_started);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
vhost_net_config_mask(get_vhost_net(nc->peer), vdev, mask);
return;
}
vhost_net_virtqueue_mask(get_vhost_net(nc->peer), vdev, idx, mask);
vhost_net_virtqueue_mask(get_vhost_net(nc->peer),
vdev, idx, mask);
}
static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)

1
hw/virtio/trace-events
View File

@ -53,7 +53,6 @@ vhost_vdpa_get_features(void *dev, uint64_t features) "dev: %p features: 0x%"PRI
vhost_vdpa_set_owner(void *dev) "dev: %p"
vhost_vdpa_vq_get_addr(void *dev, void *vq, uint64_t desc_user_addr, uint64_t avail_user_addr, uint64_t used_user_addr) "dev: %p vq: %p desc_user_addr: 0x%"PRIx64" avail_user_addr: 0x%"PRIx64" used_user_addr: 0x%"PRIx64
vhost_vdpa_get_iova_range(void *dev, uint64_t first, uint64_t last) "dev: %p first: 0x%"PRIx64" last: 0x%"PRIx64
vhost_vdpa_set_config_call(void *dev, int fd)"dev: %p fd: %d"
# virtio.c
virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned out_num) "elem %p size %zd in_num %u out_num %u"

6
hw/virtio/vhost-user-fs.c
View File

@ -161,9 +161,6 @@ static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx,
{
VHostUserFS *fs = VHOST_USER_FS(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask);
}
@ -171,9 +168,6 @@ static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VHostUserFS *fs = VHOST_USER_FS(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return vhost_virtqueue_pending(&fs->vhost_dev, idx);
}

7
hw/virtio/vhost-vdpa.c
View File

@ -734,12 +734,6 @@ static int vhost_vdpa_set_vring_call(struct vhost_dev *dev,
trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd);
return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file);
}
static int vhost_vdpa_set_config_call(struct vhost_dev *dev,
int fd)
{
trace_vhost_vdpa_set_config_call(dev, fd);
return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, &fd);
}
static int vhost_vdpa_get_features(struct vhost_dev *dev,
uint64_t *features)
@ -810,5 +804,4 @@ const VhostOps vdpa_ops = {
.vhost_get_device_id = vhost_vdpa_get_device_id,
.vhost_vq_get_addr = vhost_vdpa_vq_get_addr,
.vhost_force_iommu = vhost_vdpa_force_iommu,
.vhost_set_config_call = vhost_vdpa_set_config_call,
};

6
hw/virtio/vhost-vsock-common.c
View File

@ -125,9 +125,6 @@ static void vhost_vsock_common_guest_notifier_mask(VirtIODevice *vdev, int idx,
{
VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
vhost_virtqueue_mask(&vvc->vhost_dev, vdev, idx, mask);
}
@ -136,9 +133,6 @@ static bool vhost_vsock_common_guest_notifier_pending(VirtIODevice *vdev,
{
VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return vhost_virtqueue_pending(&vvc->vhost_dev, idx);
}

76
hw/virtio/vhost.c
View File

@ -1554,67 +1554,6 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n,
}
}
bool vhost_config_pending(struct vhost_dev *hdev)
{
assert(hdev->vhost_ops);
if ((hdev->started == false) ||
(hdev->vhost_ops->vhost_set_config_call == NULL)) {
return false;
}
EventNotifier *notifier =
&hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier;
return event_notifier_test_and_clear(notifier);
}
void vhost_config_mask(struct vhost_dev *hdev, VirtIODevice *vdev, bool mask)
{
int fd;
int r;
EventNotifier *notifier =
&hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier;
EventNotifier *config_notifier = &vdev->config_notifier;
assert(hdev->vhost_ops);
if ((hdev->started == false) ||
(hdev->vhost_ops->vhost_set_config_call == NULL)) {
return;
}
if (mask) {
assert(vdev->use_guest_notifier_mask);
fd = event_notifier_get_fd(notifier);
} else {
fd = event_notifier_get_fd(config_notifier);
}
r = hdev->vhost_ops->vhost_set_config_call(hdev, fd);
if (r < 0) {
VHOST_OPS_DEBUG(r, "vhost_set_config_call failed");
}
}
static void vhost_stop_config_intr(struct vhost_dev *dev)
{
int fd = -1;
assert(dev->vhost_ops);
if (dev->vhost_ops->vhost_set_config_call) {
dev->vhost_ops->vhost_set_config_call(dev, fd);
}
}
static void vhost_start_config_intr(struct vhost_dev *dev)
{
int r;
assert(dev->vhost_ops);
int fd = event_notifier_get_fd(&dev->vdev->config_notifier);
if (dev->vhost_ops->vhost_set_config_call) {
r = dev->vhost_ops->vhost_set_config_call(dev, fd);
if (!r) {
event_notifier_set(&dev->vdev->config_notifier);
}
}
}
uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
uint64_t features)
{
@ -1827,16 +1766,6 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
}
}
r = event_notifier_init(
&hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier, 0);
if (r < 0) {
return r;
}
event_notifier_test_and_clear(
&hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier);
if (!vdev->use_guest_notifier_mask) {
vhost_config_mask(hdev, vdev, true);
}
if (hdev->log_enabled) {
uint64_t log_base;
@ -1869,7 +1798,6 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev)
vhost_device_iotlb_miss(hdev, vq->used_phys, true);
}
}
vhost_start_config_intr(hdev);
return 0;
fail_log:
vhost_log_put(hdev, false);
@ -1895,9 +1823,6 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev)
/* should only be called after backend is connected */
assert(hdev->vhost_ops);
event_notifier_test_and_clear(
&hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier);
event_notifier_test_and_clear(&vdev->config_notifier);
if (hdev->vhost_ops->vhost_dev_start) {
hdev->vhost_ops->vhost_dev_start(hdev, false);
@ -1915,7 +1840,6 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev)
}
memory_listener_unregister(&hdev->iommu_listener);
}
vhost_stop_config_intr(hdev);
vhost_log_put(hdev, true);
hdev->started = false;
hdev->vdev = NULL;

6
hw/virtio/virtio-crypto.c
View File

@ -948,9 +948,6 @@ static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx,
assert(vcrypto->vhost_started);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask);
}
@ -961,9 +958,6 @@ static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx)
assert(vcrypto->vhost_started);
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return cryptodev_vhost_virtqueue_pending(vdev, queue, idx);
}

27
hw/virtio/virtio-mmio.c
View File

@ -673,30 +673,7 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign,
return 0;
}
static int virtio_mmio_set_config_guest_notifier(DeviceState *d, bool assign)
{
VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
bool with_irqfd = false;
EventNotifier *notifier = virtio_config_get_guest_notifier(vdev);
int r = 0;
if (assign) {
r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
} else {
virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
event_notifier_cleanup(notifier);
}
if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
vdc->guest_notifier_mask(vdev, VIRTIO_CONFIG_IRQ_IDX, !assign);
}
return r;
}
static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
bool assign)
{
@ -718,10 +695,6 @@ static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
goto assign_error;
}
}
r = virtio_mmio_set_config_guest_notifier(d, assign);
if (r < 0) {
goto assign_error;
}
return 0;

303
hw/virtio/virtio-pci.c
View File

@ -677,6 +677,7 @@ static uint32_t virtio_read_config(PCIDevice *pci_dev,
}
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector)
{
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
@ -703,160 +704,112 @@ static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
}
static int kvm_virtio_pci_irqfd_use(VirtIOPCIProxy *proxy,
EventNotifier *n,
unsigned int queue_no,
unsigned int vector)
{
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtQueue *vq = virtio_get_queue(vdev, queue_no);
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, NULL, irqfd->virq);
}
static void kvm_virtio_pci_irqfd_release(VirtIOPCIProxy *proxy,
EventNotifier *n ,
unsigned int queue_no,
unsigned int vector)
{
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtQueue *vq = virtio_get_queue(vdev, queue_no);
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
int ret;
ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, irqfd->virq);
assert(ret == 0);
}
static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no,
EventNotifier **n, unsigned int *vector)
{
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtQueue *vq;
if (queue_no == VIRTIO_CONFIG_IRQ_IDX) {
*n = virtio_config_get_guest_notifier(vdev);
*vector = vdev->config_vector;
} else {
if (!virtio_queue_get_num(vdev, queue_no)) {
return -1;
}
*vector = virtio_queue_vector(vdev, queue_no);
vq = virtio_get_queue(vdev, queue_no);
*n = virtio_queue_get_guest_notifier(vq);
}
return 0;
}
static int kvm_virtio_pci_vector_use_one(VirtIOPCIProxy *proxy, int queue_no)
{
unsigned int vector;
int ret;
EventNotifier *n;
PCIDevice *dev = &proxy->pci_dev;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
if (ret < 0) {
return ret;
}
if (vector >= msix_nr_vectors_allocated(dev)) {
return 0;
}
ret = kvm_virtio_pci_vq_vector_use(proxy, vector);
if (ret < 0) {
goto undo;
}
/*
* If guest supports masking, set up irqfd now.
* Otherwise, delay until unmasked in the frontend.
*/
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
ret = kvm_virtio_pci_irqfd_use(proxy, n, vector);
if (ret < 0) {
kvm_virtio_pci_vq_vector_release(proxy, vector);
goto undo;
}
}
return 0;
undo:
vector = virtio_queue_vector(vdev, queue_no);
if (vector >= msix_nr_vectors_allocated(dev)) {
return ret;
}
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
if (ret < 0) {
return ret;
}
kvm_virtio_pci_irqfd_release(proxy, n, vector);
}
return ret;
}
static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
{
int queue_no;
int ret = 0;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
for (queue_no = 0; queue_no < nvqs; queue_no++) {
if (!virtio_queue_get_num(vdev, queue_no)) {
return -1;
}
ret = kvm_virtio_pci_vector_use_one(proxy, queue_no);
}
return ret;
}
static int kvm_virtio_pci_vector_config_use(VirtIOPCIProxy *proxy)
{
return kvm_virtio_pci_vector_use_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
}
static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
int queue_no)
{
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
unsigned int vector;
EventNotifier *n;
int ret;
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
PCIDevice *dev = &proxy->pci_dev;
ret = virtio_pci_get_notifier(proxy, queue_no, &n, &vector);
if (ret < 0) {
return;
}
if (vector >= msix_nr_vectors_allocated(dev)) {
return;
}
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
kvm_virtio_pci_irqfd_release(proxy, n, vector);
}
kvm_virtio_pci_vq_vector_release(proxy, vector);
}
static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
{
int queue_no;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
unsigned int vector;
int ret, queue_no;
for (queue_no = 0; queue_no < nvqs; queue_no++) {
if (!virtio_queue_get_num(vdev, queue_no)) {
break;
}
kvm_virtio_pci_vector_release_one(proxy, queue_no);
vector = virtio_queue_vector(vdev, queue_no);
if (vector >= msix_nr_vectors_allocated(dev)) {
continue;
}
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector);
if (ret < 0) {
goto undo;
}
/* If guest supports masking, set up irqfd now.
* Otherwise, delay until unmasked in the frontend.
*/
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
if (ret < 0) {
kvm_virtio_pci_vq_vector_release(proxy, vector);
goto undo;
}
}
}
return 0;
undo:
while (--queue_no >= 0) {
vector = virtio_queue_vector(vdev, queue_no);
if (vector >= msix_nr_vectors_allocated(dev)) {
continue;
}
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
}
kvm_virtio_pci_vq_vector_release(proxy, vector);
}
return ret;
}
static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
{
PCIDevice *dev = &proxy->pci_dev;
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
unsigned int vector;
int queue_no;
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
for (queue_no = 0; queue_no < nvqs; queue_no++) {
if (!virtio_queue_get_num(vdev, queue_no)) {
break;
}
vector = virtio_queue_vector(vdev, queue_no);
if (vector >= msix_nr_vectors_allocated(dev)) {
continue;
}
/* If guest supports masking, clean up irqfd now.
* Otherwise, it was cleaned when masked in the frontend.
*/
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
}
kvm_virtio_pci_vq_vector_release(proxy, vector);
}
}
static void kvm_virtio_pci_vector_config_release(VirtIOPCIProxy *proxy)
{
kvm_virtio_pci_vector_release_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
}
static int virtio_pci_one_vector_unmask(VirtIOPCIProxy *proxy,
static int virtio_pci_vq_vector_unmask(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector,
MSIMessage msg,
EventNotifier *n)
MSIMessage msg)
{
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
VirtQueue *vq = virtio_get_queue(vdev, queue_no);
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
VirtIOIRQFD *irqfd;
int ret = 0;
@ -883,15 +836,14 @@ static int virtio_pci_one_vector_unmask(VirtIOPCIProxy *proxy,
event_notifier_set(n);
}
} else {
ret = kvm_virtio_pci_irqfd_use(proxy, n, vector);
ret = kvm_virtio_pci_irqfd_use(proxy, queue_no, vector);
}
return ret;
}
static void virtio_pci_one_vector_mask(VirtIOPCIProxy *proxy,
static void virtio_pci_vq_vector_mask(VirtIOPCIProxy *proxy,
unsigned int queue_no,
unsigned int vector,
EventNotifier *n)
unsigned int vector)
{
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
@ -902,7 +854,7 @@ static void virtio_pci_one_vector_mask(VirtIOPCIProxy *proxy,
if (vdev->use_guest_notifier_mask && k->guest_notifier_mask) {
k->guest_notifier_mask(vdev, queue_no, true);
} else {
kvm_virtio_pci_irqfd_release(proxy, n, vector);
kvm_virtio_pci_irqfd_release(proxy, queue_no, vector);
}
}
@ -912,7 +864,6 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
EventNotifier *n;
int ret, index, unmasked = 0;
while (vq) {
@ -921,8 +872,7 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
break;
}
if (index < proxy->nvqs_with_notifiers) {
n = virtio_queue_get_guest_notifier(vq);
ret = virtio_pci_one_vector_unmask(proxy, index, vector, msg, n);
ret = virtio_pci_vq_vector_unmask(proxy, index, vector, msg);
if (ret < 0) {
goto undo;
}
@ -930,24 +880,15 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
}
vq = virtio_vector_next_queue(vq);
}
/* unmask config intr */
n = virtio_config_get_guest_notifier(vdev);
ret = virtio_pci_one_vector_unmask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector,
msg, n);
if (ret < 0) {
goto undo_config;
}
return 0;
undo_config:
n = virtio_config_get_guest_notifier(vdev);
virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
undo:
vq = virtio_vector_first_queue(vdev, vector);
while (vq && unmasked >= 0) {
index = virtio_get_queue_index(vq);
if (index < proxy->nvqs_with_notifiers) {
n = virtio_queue_get_guest_notifier(vq);
virtio_pci_one_vector_mask(proxy, index, vector, n);
virtio_pci_vq_vector_mask(proxy, index, vector);
--unmasked;
}
vq = virtio_vector_next_queue(vq);
@ -960,22 +901,18 @@ static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtQueue *vq = virtio_vector_first_queue(vdev, vector);
EventNotifier *n;
int index;
while (vq) {
index = virtio_get_queue_index(vq);
n = virtio_queue_get_guest_notifier(vq);
if (!virtio_queue_get_num(vdev, index)) {
break;
}
if (index < proxy->nvqs_with_notifiers) {
virtio_pci_one_vector_mask(proxy, index, vector, n);
virtio_pci_vq_vector_mask(proxy, index, vector);
}
vq = virtio_vector_next_queue(vq);
}
n = virtio_config_get_guest_notifier(vdev);
virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
}
static void virtio_pci_vector_poll(PCIDevice *dev,
@ -988,17 +925,19 @@ static void virtio_pci_vector_poll(PCIDevice *dev,
int queue_no;
unsigned int vector;
EventNotifier *notifier;
int ret;
VirtQueue *vq;
for (queue_no = 0; queue_no < proxy->nvqs_with_notifiers; queue_no++) {
ret = virtio_pci_get_notifier(proxy, queue_no, &notifier, &vector);
if (ret < 0) {
if (!virtio_queue_get_num(vdev, queue_no)) {
break;
}
vector = virtio_queue_vector(vdev, queue_no);
if (vector < vector_start || vector >= vector_end ||
!msix_is_masked(dev, vector)) {
continue;
}
vq = virtio_get_queue(vdev, queue_no);
notifier = virtio_queue_get_guest_notifier(vq);
if (k->guest_notifier_pending) {
if (k->guest_notifier_pending(vdev, queue_no)) {
msix_set_pending(dev, vector);
@ -1007,34 +946,6 @@ static void virtio_pci_vector_poll(PCIDevice *dev,
msix_set_pending(dev, vector);
}
}
/* poll the config intr */
ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, &notifier,
&vector);
if (ret < 0) {
return;
}
if (vector < vector_start || vector >= vector_end ||
!msix_is_masked(dev, vector)) {
return;
}
if (k->guest_notifier_pending) {
if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) {
msix_set_pending(dev, vector);
}
} else if (event_notifier_test_and_clear(notifier)) {
msix_set_pending(dev, vector);
}
}
void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq,
int n, bool assign,
bool with_irqfd)
{
if (n == VIRTIO_CONFIG_IRQ_IDX) {
virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
} else {
virtio_queue_set_guest_notifier_fd_handler(vq, assign, with_irqfd);
}
}
static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
@ -1043,25 +954,17 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
VirtQueue *vq = NULL;
EventNotifier *notifier = NULL;
if (n == VIRTIO_CONFIG_IRQ_IDX) {
notifier = virtio_config_get_guest_notifier(vdev);
} else {
vq = virtio_get_queue(vdev, n);
notifier = virtio_queue_get_guest_notifier(vq);
}
VirtQueue *vq = virtio_get_queue(vdev, n);
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
if (assign) {
int r = event_notifier_init(notifier, 0);
if (r < 0) {
return r;
}
virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, true, with_irqfd);
virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
} else {
virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, false,
with_irqfd);
virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
event_notifier_cleanup(notifier);
}
@ -1103,7 +1006,6 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
msix_unset_vector_notifiers(&proxy->pci_dev);
if (proxy->vector_irqfd) {
kvm_virtio_pci_vector_release(proxy, nvqs);
kvm_virtio_pci_vector_config_release(proxy);
g_free(proxy->vector_irqfd);
proxy->vector_irqfd = NULL;
}
@ -1119,11 +1021,7 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
goto assign_error;
}
}
r = virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, assign,
with_irqfd);
if (r < 0) {
goto config_assign_error;
}
/* Must set vector notifier after guest notifier has been assigned */
if ((with_irqfd || k->guest_notifier_mask) && assign) {
if (with_irqfd) {
@ -1132,14 +1030,11 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
msix_nr_vectors_allocated(&proxy->pci_dev));
r = kvm_virtio_pci_vector_use(proxy, nvqs);
if (r < 0) {
goto config_assign_error;
goto assign_error;
}
}
r = kvm_virtio_pci_vector_config_use(proxy);
if (r < 0) {
goto config_error;
}
r = msix_set_vector_notifiers(&proxy->pci_dev, virtio_pci_vector_unmask,
r = msix_set_vector_notifiers(&proxy->pci_dev,
virtio_pci_vector_unmask,
virtio_pci_vector_mask,
virtio_pci_vector_poll);
if (r < 0) {
@ -1154,11 +1049,7 @@ notifiers_error:
assert(assign);
kvm_virtio_pci_vector_release(proxy, nvqs);
}
config_error:
kvm_virtio_pci_vector_config_release(proxy);
config_assign_error:
virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, !assign,
with_irqfd);
assign_error:
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
assert(assign);

4
hw/virtio/virtio-pci.h
View File

@ -251,7 +251,5 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t);
* @fixed_queues.
*/
unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues);
void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq,
int n, bool assign,
bool with_irqfd);
#endif

29
hw/virtio/virtio.c
View File

@ -3494,14 +3494,7 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n)
virtio_irq(vq);
}
}
static void virtio_config_guest_notifier_read(EventNotifier *n)
{
VirtIODevice *vdev = container_of(n, VirtIODevice, config_notifier);
if (event_notifier_test_and_clear(n)) {
virtio_notify_config(vdev);
}
}
void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
bool with_irqfd)
{
@ -3518,23 +3511,6 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
}
}
void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
bool assign, bool with_irqfd)
{
EventNotifier *n;
n = &vdev->config_notifier;
if (assign && !with_irqfd) {
event_notifier_set_handler(n, virtio_config_guest_notifier_read);
} else {
event_notifier_set_handler(n, NULL);
}
if (!assign) {
/* Test and clear notifier before closing it,*/
/* in case poll callback didn't have time to run. */
virtio_config_guest_notifier_read(n);
}
}
EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq)
{
return &vq->guest_notifier;
@ -3608,11 +3584,6 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq)
return &vq->host_notifier;
}
EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev)
{
return &vdev->config_notifier;
}
void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled)
{
vq->host_notifier_enabled = enabled;

3
include/hw/virtio/vhost-backend.h
View File

@ -126,8 +126,6 @@ typedef int (*vhost_get_device_id_op)(struct vhost_dev *dev, uint32_t *dev_id);
typedef bool (*vhost_force_iommu_op)(struct vhost_dev *dev);
typedef int (*vhost_set_config_call_op)(struct vhost_dev *dev,
int fd);
typedef struct VhostOps {
VhostBackendType backend_type;
vhost_backend_init vhost_backend_init;
@ -173,7 +171,6 @@ typedef struct VhostOps {
vhost_vq_get_addr_op vhost_vq_get_addr;
vhost_get_device_id_op vhost_get_device_id;
vhost_force_iommu_op vhost_force_iommu;
vhost_set_config_call_op vhost_set_config_call;
} VhostOps;
int vhost_backend_update_device_iotlb(struct vhost_dev *dev,

4
include/hw/virtio/vhost.h
View File

@ -29,7 +29,6 @@ struct vhost_virtqueue {
unsigned long long used_phys;
unsigned used_size;
EventNotifier masked_notifier;
EventNotifier masked_config_notifier;
struct vhost_dev *dev;
};
@ -38,7 +37,6 @@ typedef unsigned long vhost_log_chunk_t;
#define VHOST_LOG_BITS (8 * sizeof(vhost_log_chunk_t))
#define VHOST_LOG_CHUNK (VHOST_LOG_PAGE * VHOST_LOG_BITS)
#define VHOST_INVALID_FEATURE_BIT (0xff)
#define VHOST_QUEUE_NUM_CONFIG_INR 0
struct vhost_log {
unsigned long long size;
@ -118,8 +116,6 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev);
void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev);
int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev);
bool vhost_config_pending(struct vhost_dev *hdev);
void vhost_config_mask(struct vhost_dev *hdev, VirtIODevice *vdev, bool mask);
/* Test and clear masked event pending status.
* Should be called after unmask to avoid losing events.

7
include/hw/virtio/virtio.h
View File

@ -67,9 +67,6 @@ typedef struct VirtQueueElement
#define VIRTIO_NO_VECTOR 0xffff
/* special index value used internally for config irqs */
#define VIRTIO_CONFIG_IRQ_IDX -1
#define TYPE_VIRTIO_DEVICE "virtio-device"
OBJECT_DECLARE_TYPE(VirtIODevice, VirtioDeviceClass, VIRTIO_DEVICE)
@ -111,7 +108,6 @@ struct VirtIODevice
bool use_guest_notifier_mask;
AddressSpace *dma_as;
QLIST_HEAD(, VirtQueue) *vector_queues;
EventNotifier config_notifier;
};
struct VirtioDeviceClass {
@ -314,14 +310,11 @@ uint16_t virtio_get_queue_index(VirtQueue *vq);
EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
bool with_irqfd);
void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
bool assign, bool with_irqfd);
int virtio_device_start_ioeventfd(VirtIODevice *vdev);
int virtio_device_grab_ioeventfd(VirtIODevice *vdev);
void virtio_device_release_ioeventfd(VirtIODevice *vdev);
bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev);
void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
void virtio_queue_host_notifier_read(EventNotifier *n);
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,

2
include/net/vhost_net.h
View File

@ -39,8 +39,6 @@ int vhost_net_set_config(struct vhost_net *net, const uint8_t *data,
bool vhost_net_virtqueue_pending(VHostNetState *net, int n);
void vhost_net_virtqueue_mask(VHostNetState *net, VirtIODevice *dev,
int idx, bool mask);
bool vhost_net_config_pending(VHostNetState *net);
void vhost_net_config_mask(VHostNetState *net, VirtIODevice *dev, bool mask);
int vhost_net_notify_migration_done(VHostNetState *net, char* mac_addr);
VHostNetState *get_vhost_net(NetClientState *nc);